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R. e. DONALDSON,

GRATE.

APPLICATION FILED JULY 23, |913.

1 ,S24-803. Patented Dec. 16, 1919.

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'v www R. '6. DONALDSON.

GRATE.

APPLICATION FILED IULY 23.1918.

1,324.,803. Patented Dec. 16,1919. I

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lAPPLICATION FILED JULY 23,1918.

1,324,803'. Patented Dee. 16, 1919.

, State of Ohio,

ROY G. DONALDSON, OF CESTLINE, OHIO.'

GRATE..

Application filed July as, 1918.

To all whom t may concern.' v

Be it known that I, ROY G. DONALDSON, a citizen of the United States,residing at Crestline, in the county of Crawford and have inventedcertain new and useful Improvements in Grates, of which vthe followingis a specification.

My invention relates to improvements vin gra-tes, adapted for the like.Y l

An important object of the invention is to provide a grate of the abovementioned character, having means to properly shake the coal, e'ectivelyslice or break up clinkers, and discharge the lclinkers from theiirebox. Other objects and advantages of the invention will be apparentduring the 'course of the following description.

ln the accompanying drawings forming a part of this specication andwhich like numerals are employed to designate like parts throughout thes ame,

Figure l is a plan view of bodying my invention,

` Fig. 2 is a longitudinal sectional view taken on line 2-2 of Fig. 1, YFig. 3 is a transverse sectional view on line 3-3 of Fig. 1,

Fig. 4L is a similar view taken on line els-4 of Fig. 1,

Fig. 5 is a perspective view of one of the movable side grate members,

Fig. 6 is a similar view of the central movable grate member, Y

Fig. 7 is a fragmentary perspective view of a stationary transversegrate member, Fig. 8 is a similar` view of a stationary longitudinalgrate member, and,

Fig. 9 is a perspective view of a Slicer blade. In the drawings,whereinfor the purpose of illustration is shown a preferred embodiment of myinvention, the numeral 10 designates a horizontal preferably rectangularframe having a'pair of longitudinal coal discharging hoppers 11 arrangedtherein. These hoppers are stationary.

apparatus em taken Each hopper, as shown in Fig. 3, embodiesk upwardlydiverging discharge passages 12. The space between the upper ends ofthese passages l2 is covered by longitudinal horizontal grate sections13. Arrangedat spaced intervals between the longitudinal grate sections13 are transverse grate secspecifieatian of Letters Patent.

use in connection withrailway locomotives, stationary boilers or'Patented Dee. 16, 1919. Lserial No. 246,362.

tions 14, shown more clearly in Figs. 1

Beneath the transverse grate sec-` and el. tions 14, the hoppers '11have their lower endsclosed or covered by deiiectors 15having inclinedupper faces 16.V Openings 17 are formed in the opposite side walls ofthe diveiging passages 12 and permit of the ashes ort-he like passingtherethrough into the ash-pit.

Traveling longitudinally of and Ybeneath each discharging hopper 11 isan`4 endless coal or fuel conveyer 18, having feeding elements or drags'19, tofeed the fuel forwardly.4 The fuel is delivered into a hopper 20,and carried by the conveyer into the passages 12 and is forced upwardly'through the saine, to be fed upon the grate members. As no claim is madeto the feeding mecha` nisni' per se `in this application, no detaileddescription of the saine is given, such feeding mechanism being shownand in my copending application for Stoker, i'iled July 246,363.

Extending longitudinally and centrally of the frame 1 0 is a centralcleansing and agitating apparatus embodying alongitudinal shaft 21,suitably secured to the ends of the frame 10. lounted to turn upon thisshaft are cleaning elements 22, arranged in end to end relation. Eachcleaning' element, as more clearly shown in Fig. 6, embodies a sleeve23, pivotally receiving the, shaft 21. This sleeve extends upwardly inthe form of a tapered blade 24. Extending laterally upon opposite sidesofv the blade 24: are spaced gers or bars 25 yand 26,v

underfeed vthe flanges 26 having upwardly extending angularv projections27, formed thereon. Each'flnger 26 is further provided with depending reretaining or supporting element 28, preferably tapered, as shown.

Arranged near and upon opposite sidesv` of the central cleaningapparatus are stationary grate sections29. As clearly shown in Fig. 1,each grate section 2 9 embodies sets of inwardly projecting barsorfingers 30,' the inner ends of the bars in the two sets being spaced fortudinal opening 31. Th's longitudinal opening is adapted for thereception of swinging slicer blades 82, which is curved iny transversesection, as shown. The Slicer blades^32 Yare provided at their endswithV cranks 83, pivoted tothe grate sectionsV 30,

described v23,' 1918, Serial No.

providing a longih a bell-crank lever as shown at 34. in operation, theslicer blades 32 are simultaneously swung inwardly, thereby cutting intothe clinkers which may have formed', while the cleaning element 22 isswung upon its pivot, serving to coact with the slicer blades to breakup the clinkers. rlhe fire retaining elements 28 are swung upwardlysimultaneously blades, to prevent the coal and clinkers from improperlyfalling from the grate. These fire retaining elements' in their elevatedpositions form ash and clinker receiving pockets which, upon themovement of these elements to their lower positions, discharge the ashand clinker contained in such pockets. As is clearly shown, the gratesections 29 are transversely inclined and ex tend downwardly from thehopper 1l.

Arranged upon the outer sides of the troughs l2 are side. cleaningapparatuses, each of which comprises inner stationary Gra-te sections35, embodying short and long ransverse bars or fingers 3G and 37. rIherate sections may be attached to the oi oes 1L arranged outwardly of andtne grate sections are coacting cleaning elements 38, three of whichconstitute a unit. Each cleaning element 38 embodies aA sleeve 39,mounted to' rotate upon a. horizontal longitudinal shaft 40 suitablysecured to the frame 10. Extending inwardly from the sleeve 39 areclinker bars 4l, having lower faces 42, which lare curved', as shown.rhe sleeve 39 carries outwardly extending bars or fingers 43, which areangularly arranged, as shown.

llxtending longitudinally of the frame l0 and upon one side thereof is arock-shaft 44, turned by means of a gear 45, driven by any suitablemeans. lligidly secured to the rockshaft 44 and depending therefrom arecranks 46, three in number, corresponding to the different units of theapparatus. ln connection with each unit there is a transversereciprocatory pitman 47, having pivotal connection with a link 48,pivoted to the lower end of the crank 46. At its center, the pitman 4"?is provided with an upwardly extending projection 49, carrying a pin orbolt 50 operating in a slot 5l, formed in a crank 52 rigidly secured tothe sleeve 23 of the central cleaning element.

This central cleaning element also serves to operate the correspondingpair of slicer bars 32. ivotally connected with one end of each slicerbar is a link 52', as shown at 53. @ne link 52 is pivotallyconnected'with 54, as shown at 55, while the other link 52 is pivoted toa bell-crank lever 56, as shown at 57. The bell-crank lerer 54 ispivoted at 58 and the bell-crank lever is pivoted at 59. A link 60 is-pivoted to the bell-crank lever 56 and with the upstanding arm of thebell-crank lever54,

with the movement of the slicery as shown at 6l. At its upper end thebellcrank lever 54 carries a laterally extending pin 62, arrangedbetween lugs 63 and 64, formed Vupon the sle ve 23. It is thus apparentthat when the sleeve is turned clockwise the lug 63 will contact withthe pin 62 thereby swinging the bell-crank levers 54 and 56Y upon theirpivots and forcing the Slicer blades 32 upwardly and inwardly. When thesleeve is turned in the opposite direction the lug 64 returns the slicerblades to the lowered position.

At its right end, the pitman 47 has pivotal connection with a link 65,pivoted to a depending crank 66, rigidly secured to the sleeve 39. Atthe left end, the pitman 47 has pivotal connection with a bell-cranklever 67, pivotally supported at 88. The bell-crankrlever 67 has pivotalconnection with the link G9, pivoted to a crank 70, rigidly secured tothe sleeve 39 of the left side cleaning element. lt is obvious that theside cleaning elements are swung simultaneously in opposite directions.

The'operation of the appara-tus is as follows:

The coal is fed into the hoppers 20, and is carried by the conveyors 18into the passages l2 of the troughs and fed upwardly upon the gratemembers, where combustion takes place in the usual manner. When it isdesired to shake the grate, the shaft 44 is rocked. rhis movement of theshaft causes the central and side cleaning apparatuses to operate.Tv/Vhen the shaft is turned sufficiently in 'a clockwise direction, theslicer bla-des 32 are forced upwardly and inwardly, which tends to breakup or slice clinkers accumulating in proximity thereto. lilith thismovement of the slicer blades, the shaft 2l is turned and theprojections or teeth 27 cut or break ofi' the clinker, operating inconjunction with the slicer blades and discharge the same from thegrate, through the open ingV occurring at the right, at the cleaningelement, the retaining elements 28 being then elevated and serving tosupport the re and prevent the coal from improperly fallingy from thegrate.

Simultaneously with this movement of the slicer blades, the sidecleaning apparatuses are operated. The members 41 are swung upwardly andoutwardly and the straight edges thereof serve to cut or pinch olfelinkers which may be formed in proximity thereto, discharging the samefrom the top of the gra-te, through the opening occurring at the outersides thereof, the curved surface 42 of these elements serving tosupportthe coal and prevent the discharge of the same.

Itis to be understood that the form of my invention herewith shown anddescribed is to be taken as apreferred example ofthe `Y same, and thatvarious changes in the shape, size, and arrangement of parts may bereiio sorted to without departing from the spirit of the invention orthe scope of the subjoined claims.

Having thus described my invention, I claim:

1. In a grate of the character described, the combination with a pair ofrelatively stationary versely inclined with respect to the grate andextend downwardly toward their inner edges and have longitudinalopenings formed therethrough, of cleaning apparatus arranged between andnear the inner lower edges of the inclined grate sections and providedwith upwardly extending projections which are disposed to coact with theinner lower edges of the grate sections for breaking up the clinker,means for turning the cleaningl apparatus upon its longitudinal axis,transversely curved Slicer-blades pivotally supported outwardly of andnear the grate sections and arranged to move within the longitudinalopenings of the same, said Slicer-blades being adapted to assume anupper position whereby they project above and across the inclined gratesections and are spaced from the cleaning apparatus, the inner edges ofthe Slicer-blades being then spaced, and means to swing theSlicer-blades upon their pivots.

2. In a grate of the character described, the combination with a pair ofrelatively stationary grate sections which are spaced and transverselyincline with respect to the grate and extend downwardly toward theirinner edges and have longitudinal openings Y formed therethrough, ofcleaning apparatus arranged between and near the inner lower edges ofthe inclined grate sections and ncluding upwardly projecting members forcoaction with the lower edges of the ingrate sections which are trans-VVclined grate sections for breakingA up the clinker, supportingelementsarranged at an angle to the teeth and adapted to assume a positionbetween the inclinedv grate sections to prevent the improper dischargeof the fuel, means to turn the cleaning apparatus upon its longitudinalaxis, transversely curved slicer-blades pivotally supported outwardly ofand near the inclined grate sections and arranged to move within thelongitudinal openings of the same, said Slicer-blades being adapted toassume an upper position whereby they project above and across portionsof the inclined grate sections and are spaced from the cleaningapparatus, the inner edges of the slicerblades being then spaced, meansto swing the Slicer-blades upon their pivots.

8. In a grate of the character described,

the combination with a pair ofspaced rela- 5 tively stationary gratesections which are transversely inclined with respect to the grate andextend downwardly toward their inner edges and have longitudinalopenings formed therethrough, of cleaning apparatus arranged between andnear the inner lower edges of the inclined grate sections and adapted tocoact with such inner lower edges in breaking up the clinker, means forturning the cleaning apparatus upon its longitui dinal axis,Slicer-blades adapted for move# ment within the longitudinal openings ofthe inclined grate sections and adapted when shifted to the upperposition to be disposed above and spaced from thecleaning apparatus andserving to cut 0E the clinker and prevent its upward movement by theturning of the cleaning apparatus, and means to move the slicereblades.

In testimony whereof I aix my signature.

ROY G. DONALDSON.

